SYSTEM OF PLACEMENT OF SHINGLES ON A ROOF, A PLURALITY OF SHINGLES THUS PLACED, AND A ROOF WITH SUCH SHINGLES THEREON

摘要

A system of placement of adjacent roofing shingles on a roof is provided,wherebythe horizontal spacing of adjacent shingles, the vertical placement ofshingles, and theproper angular orientation of shingles is provided, due to a system of indiciaon a visibleupper surface of the shingles. The indicia include at least one line non-perpendicular andnon-parallel to a shingle edge. A plurality of adjacent appropriately orientedshingles andappropriately placed shingles are provided, as is a roof having a plurality ofshingles laidup thereon in courses.